diff options
| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-07-05 17:28:12 +0900 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-07-08 13:35:48 +0400 |
| commit | 99b072bb38c9b398bc7c3fc8a0f30d0801f78750 (patch) | |
| tree | 0162568c00d24d580c1ed61963eb00b9025bc685 /fs | |
| parent | 3de91f92377f1477c88a58bcad5b5615ffc4aad5 (diff) | |
| download | lwn-99b072bb38c9b398bc7c3fc8a0f30d0801f78750.tar.gz lwn-99b072bb38c9b398bc7c3fc8a0f30d0801f78750.zip | |
f2fs: fix readdir incorrectness
In the previous Al Viro's readdir patch set, there occurs a bug when
running
xfstest: 006 as follows.
[Error output]
alpha size = 4, name length = 6, total files = 4096, nproc=1
1023 files created
rm: cannot remove `/mnt/f2fs/permname.15150/a': Directory not empty
[Correct output]
alpha size = 4, name length = 6, total files = 4096, nproc=1
4097 files created
This bug is due to the misupdate of directory position in ctx.
So, this patch fixes this.
[AV: fixed a braino]
CC: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/dir.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c index 9d1cd423450d..62f0d5977c64 100644 --- a/fs/f2fs/dir.c +++ b/fs/f2fs/dir.c @@ -610,13 +610,12 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) { struct inode *inode = file_inode(file); unsigned long npages = dir_blocks(inode); - unsigned int bit_pos = 0, start_bit_pos = 0; + unsigned int bit_pos = 0; struct f2fs_dentry_block *dentry_blk = NULL; struct f2fs_dir_entry *de = NULL; struct page *dentry_page = NULL; unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK); unsigned char d_type = DT_UNKNOWN; - int slots; bit_pos = ((unsigned long)ctx->pos % NR_DENTRY_IN_BLOCK); @@ -625,7 +624,6 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) if (IS_ERR(dentry_page)) continue; - start_bit_pos = bit_pos; dentry_blk = kmap(dentry_page); while (bit_pos < NR_DENTRY_IN_BLOCK) { bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, @@ -634,19 +632,19 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) if (bit_pos >= NR_DENTRY_IN_BLOCK) break; - ctx->pos += bit_pos - start_bit_pos; de = &dentry_blk->dentry[bit_pos]; if (de->file_type < F2FS_FT_MAX) d_type = f2fs_filetype_table[de->file_type]; else d_type = DT_UNKNOWN; if (!dir_emit(ctx, - dentry_blk->filename[bit_pos], - le16_to_cpu(de->name_len), - le32_to_cpu(de->ino), d_type)) - goto success; - slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); - bit_pos += slots; + dentry_blk->filename[bit_pos], + le16_to_cpu(de->name_len), + le32_to_cpu(de->ino), d_type)) + goto stop; + + bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); + ctx->pos = n * NR_DENTRY_IN_BLOCK + bit_pos; } bit_pos = 0; ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK; @@ -654,7 +652,7 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx) f2fs_put_page(dentry_page, 1); dentry_page = NULL; } -success: +stop: if (dentry_page && !IS_ERR(dentry_page)) { kunmap(dentry_page); f2fs_put_page(dentry_page, 1); |